Process of dissolving size for paper-making.



No. 816,865. fwm'ri APR. s, 1906. Hmm-mm. PROCESS 0F mssoLvING SIZE FOR PAPER MAKING.

APPLICATION FILED JULY 7. 1905.

w; UH H'rlgfll'yfi `if NI /Hgflllfml N HW MH] Il l l/,Illlfll'lllllll 'solving size for paper-making, V. object to improve the process UNITED STATES PATENT oEEioE.

BRUNO KNIFFLER, OF STONEHAM, MASSACHUSETTS.

PROCESS oF 'DlssoLviNc-r. SIZE Fon PAPER-MAKING..

Patented April 3, 1906.

Application filed July 7,1905. Serial No. 268,710.

To a/ZZ `whom,` it may concern:

Be it known that I, BRUNO KNIEFLER, of Stoneham, county of Middlesex, State oi.' Massachusetts, have invented an Improvement in Processes of Dissolving Size for Paper-Making, of which the following description, in connection with the accompanying drawing, is a y specication, like characters on the drawing ireplresenting like parts.

to a process ci disand has for its t'o the end that amore perfect emulsion is produced with a size containing a larger percentage oi Jr'ree or unsaponiiied resin than theordinary or comhis invention relates marcial resin soap, such size being herein desl The drawing shows in vertical section one provided for carrying out this invention,4 one 4Way is herein shown for the sake of illustra- -foi'm In carrying out my invention a measured` of apparatus by which my improved :process may be carried out.

tion.

a. represents a tank adapted to contciiha measured volume ot resin size. A pi e a. leads from the bottom of the tank c to a eat- 4 ing apparatus, which conducts the sizethereto in 'order that it may be heated, andsaid jpe contains a valve for regulatingthetlow.V

e heating apparatus consists, essentially, of a' drum a, containing vertical tubes c3, whi ch are connected at theirupper and lower,l

ends to the steam-chambers at aP, which are" respectively connected with the steam-pipes a. a7. The size flows into the drum a2 around the steam -tubes and becomes heated. -A pipe b leads from the lower end of the `drum a? to afreceiver b', which is closed at its upper end b2 by a cap,through which'a rod b3 passes and which is enlarged at its lower end portion aid plzlovided with aperforated end piece or ate 4. `ijhe` receiver b' and has at its lower end a plate fb, from the under side of which several pins jected to the action of forcibly-expelled jetsI The rod b3 extends down through l b project, which are adapted to be thrust into the perforations in the late t* when the rod b3 is pressed down. l e pins are provided for the purpose ofclosing the perforations or for clearing 'the perforations in case they should become' clogged. The liqueed size Hows from the heating-drum a2 to the receiver b and passes through the perforati ons in the plate b4L by gravity. The eriorations are quite small, so that the lique ed size will be discharged in very small jets or streams. The lower end portion of the receiver b is contained inan emulsifying-chamber.

c represents an upright tube open at both ends which is connected to a ipe c at a point substantiallymidway its llength, and concentrically arranged within said tube c is a tube c of lesser diameter, which is formed with perforations from end to end and which is attached at each end to the tube c. The inner .perforated tube is made substantially laslongas the outertube c, and the means empio edv for connecting it ywith said outer tube c oses the space between the two tubes at the ends to thereby form an annular space or chamber between the two tubes, the exits therefrom being the periorations in the inner tube c2. The space within the inner tube c2 serves as the emulsifyin chamber, and the lower 4end of the receiver extends down into said chamber for a short distance, being located at the upper endof the chamber. The pipe c has connected with it a cold water pipe c3 and a steam-pipe c, and the steam enters and passes by the end of the cold-Water pipe c3 and meets the water which enters the ipe c', so that the Water is heated and is orcedby the steam-pressure into the annular space or chambersurrounding the emulsifying-chamber `and fis caused to enter the said emulsifying-charnber through the perforations in the tube c. The perforations in the inner tube are quite small, so that the jhot water issues in small jets or streams, and

ysaid perforations being ocated in the side wall of the emulsiying-.chamber said jets or streams will be directed at right angles or thereabout to the jets or streams of liquefiedl size dischargin 'from the receiver b', and as a result the smal jets or streams of liquefied size are disintegrated and becoming mixed with the hot water produce an emulsion which is dischar ed from the lower end of the emulsifying-c amber. The emulsii'yingchamber is contained in an empty tank d, so that the emulsion is discharged into said- IIO ; tank e.

tank. The volume of hot-Water used will be regulated by a valve, so that a redetermined proportion of hot Water wil be used relative to the volume of size and an emulsion of predetermined relative proportions thus produced. The emulsion rises in the tank d until it reaches a level near the top of the emulsiying-chamber, at which point an outlet-pi e d leads from the tank to conduct the em sion to another tank e, which is many times larger than the tank d and con tains a measured volume of cold Water. The emulsion flows freely from'the tank d to the The inlet end of the outlet-pipe d may be screened, if desired. By lacing the emulsifying-chamberin the tank d) the emulsion contained in said tank will be more or less agitated by the steam-pressure; but in practice the emulsi ing-chamber may be located above theta d, if desired. 'I prefer, however, to agitate the emulsion in the tank d, and vhence extend the steam-pipe a7 down into said tank.

In carrying out my invention the relative pro ortions of the emulsion contained in the tan d will be fteen of hot water to one of size, or thereabout and in the tank e thirty of Water to one of size or thereabout; but these relative proportions may be vwidely varie This process is particularly ,designed to be carried on on a large scale and to produce a more perfect emulsion. Even though using a size which contains a very large percentage of free or unsaponied resin by subjecting the' small jets or streams of liquefied size to the action of the 'forcibly expelled jets or streams of liet Water the jets or streams of size are so completely disintegrated that any 'free resin therein will be emulsiiied or held in suspension, and therefore will act advantageously instead of injuriously when introduced inte the paper-pulp.

Having thus described my invention, what l claim as new, and vdesire to secure by Letters Patent, is-

vThe process herein described of preparing size for papenmaking, which consists in heating a measured volume of resin size, then subjecting the same in small 'ets orv streams tothe action of forcibly-expelled jets or streams of hot water, in predetermined relative proportions, to disintegrate the jets or streams of liquefied size and produce an emulsion, and in then adding the emulsion to a measured volume of cold water.

In testimony whereof I have signed my name to this specification in the presence of- A two subscribing Witnesses.

i lBRUNO KNIFFLER.

Witnesses:

B. J. N ores, H. B. DAVIS. 

